Mayweather commented on the upcoming bout, reportedly saying, "I'm going to whip that ass," according to Yahoo! Sports' Kevin Iole.

It's difficult to imagine the 44-0 Mayweather losing to anyone, especially after the transcendent performance he put forth against Robert Guerrero earlier this month in a unanimous-decision win. But there are very few opponents who are more compelling than Canelo.

Alvarez is confident heading into the mega-fight, according to Iole:

"He's a great fighter, but I have intelligence in that ring and I have the same speed he has," Alvarez said through interpreter Eric Gomez. "I can use my head, but I have that special thing: I have some power that will help me."

The 22-year-old Alvarez is 42-0-1 and coming off a unanimous-decision win of his own in which he knocked down the previously undefeated Austin Trout in the seventh round. The right-hander possesses the machine-like offensive skill set and punching ability to at least challenge Mayweather's world-class defense.

Floyd Mayweather will fight Canelo Alvarez on Sept. 14. It will be Mayweather's 1st fight vs undefeated opponent since Ricky Hatton in 2007.